Tube-fastening.



PATENTBD OUT. 18, 1904.

0,'0ARR. TUBE PASTENING. APPLICATION FILED DBO.17. 1903.

N0 MODEL.

(7111 Ucllloz, W

. a specification, reference being had. therein to Ifs UNITED STATES;

Patented Qctober 418, 1904.

OMA CARR, OF BUENAVIST, VIRGINIA.

TUBE-FASTENING.

SPECIFICATION forming part-of Letters Patent No. 772,641, datea'october 18, 1904.

Application 'lefl December 17, 1903. Seiial No. 185,530. (No model.)`

invented certain new and useful Improvements' in Tube-,Fasteninge of which the following is the accompanying drawings, in which-.v

Figure' l is a longitudinal vertical sectional view of a portion of an evaporator, showing the device applied; Fig. 2, anenlarged horizontal sectional view of one end of a tube; Fig. 8, an end view thereof; Fig. 4, a detail side elevation showing a slightly -dilerent form of limiting-,stop and fastening device for the tubes; Fig. 5, a detail end View of the form of the device shown in Fig.4, and Fig. 6 a detail view, showing the-manner of securing both ends of a tube to the tube-sheets.

The ordinary method-of fastening tubes in,

` damaging them beyond the possibility of re-` use. Tubes thus secured in position must be `'cleaned while in their permanent positions,

resort being had to such local mechanical treatment as conditions permit or to chemical solvent action on the incrustation, neither of which methods is at allr satisfactoryA and frelquently utterly destroy the tubes.

This invention has for its main object to provide each tube with a fastening device by vwhich it may be removably secured to a tubesheet either at one or both ends of the tube and which when in position will be adaptedv to stand a high `pressure without leakage atA the point of connection with the tube-sheet.

In the drawings I have shown my invention as applied to an evaporator in which the tube are supported at one end only.

Referring to the various parts by numerals, l designates the tubes, and 2 the tube-sheet. Each tube at the inner face of the tube-sheet is provided with an annular enlargement or stop 3,`which limits its passage through the tube-sheet. On the tube and against the outer face of the tube-sheet is placed a packing-ring 4. Fitting closely `on the outer projecting end of the tube is van undercut compressionring 5, which is adapted lto clamp the packing-ring against the tube-sheet and to make a pressure-.tight joint between it and the tube. The undercut part of the pressure-ring is adapted to receive the major portion of the packing-ring. Itis obvious that the packingring may be dispensed with, if desired, and

vthe pressure-ring be made to bear directly against the outer face of the tube-sheet. Each tube near its outer projecting end is provided with apertures throughwhich extends a bar or pin 6, the-ends of vsaid bar projecting beto bear upon the compression-ringat diametrically opposite points. It will be thus seen that by forcing the compression-ring against the outer face of the tube-sheet the shoulder 3 will be drawn againstthe inner face of said sheet. The tube will be thereby rigidly held in position and the packing-ring will be compressed suficiently to form a pressure-tight joint between the sheet and the tube.-

Itwill be of course understood that any sui table means for forcing inward the compression-ring maybe employed instead of the compression-screws shown in Figs. 2 and 3. In

Figs. 4 and' said ring isn forced inward by means of a wedgelO, which 1s driven down between the bar. 6 and the follower 9, which rests at its ends on the compression-rings. In this arrangement of parts the pin 6lx and follower 9 bridge the space between two adjoining` tubes, as shown in Fig.y 5. `In this form of the device each device serves to simultaneously operate upon two adjacent compressionannular ring 3 may be riveted to the tube, as shown in Fig. il, to form the stop.

Where the apparatus is provided with two tube-sheets, one for each end of the tube, the limiting-stop is omitted and a fastening device is secured to each projecting end of the tube, as shown in Fig. 6, so that each fastening device forms a limiting-stop for the other.

rIhe advantages of this invention will be readily appreciated. It is obvious that by loosening the set-screws and removing the bar 6 the compression-ring and packing-ring may be readily removed and the tube then withdrawn from the tube-sheet. It is thus clear that the cleaning of the tubes or the replacing of a broken or worn tube with a new one may be readily accomplished.

Many changes may be made in the construction of this device within the scope of the invention and to adapt the device for use under various conditions, and I wish it understood that I do not limit myself to the specific constructions herein shown and described.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination of a tube-sheet, a series of tubes extending therethrough and each provide-d with a limiting-stop, a compressionring on the projecting end of each tube bearing against the outer face of the tube, a bar positively connecting each adjacent pair of tubes at a point beyond the compression-ring, and means interposed between said bar and the compression-rings for simultaneously tightening the adjacent compression rings, for the purposes set forth.

2. In a tube-fastening, the combination of a tube-sheet perforated for the passage of a series of tubes, tubes fitted therein and provided each with a limitingstop, and a clamping device positively locked on the outer ends of each adjacent pair of tubes and bearing against the outer face of the tube-sheet and adapted to removably clamp and simultaneously adjust each adjacent pair of tubes to the tube-sheet.

3. In a tube-fastening, the combination of a tube-sheet perforated to receive a series of tubes, tubes fitted therein and provided each with a stop, a compression-ring fitted on the outer projecting end of each tube, and means locked to adjacent pairs of tubes for forcing the adjacent compression-rings against the tube-sheet to thereby simultaneously draw the limiting-stops to their seats and close the joints between the tubes and the tube-sheet.

1I. In a tube-fastening, the combination of a tube-sheet perforated to receive a series of tubes, tubes fitted therein and provided cach with a limiting-stop, a compression-ring on the outer projecting end of each tube, adjustable means carried by each adjacent pair of tubes for forcing the con'u'n'ession-ring against the outer face of the tube-sheet to simultaneously adjust and removably clamp each adjacent pair of tubes in position.

5. In a tube-fastening, the combination of a tube-sheet, a series of tubes fitted therein, a limiting-stop for each tube, a compressionring on the outer projecting end of each tube, a packing-ring for each compression-ring` and adjustable means carried by adjacent pairs of tubes for simultaneously forcing the compression and packing rings of said adjacent pair of tubes against the adjacent face of the tube-sheet to removably secure the tubes in position and close the joints between the tubes and the sheet.

6. In an apparatus of the class described, embodying two separated tube-sheets, a tube connecting and extending through said sheets and having projecting ends, and an adjustable clamping device on each projecting end and bearing against the adjacent face of the adjacent tube-sheet.

In testimony whereof I hereunto affix my signature, in the presence of two witnesses, this 16th day of December, 1903.

OMA GARR.

fitnessesz G. H. BAILIE, H. T. WTILSON. 

